Search Results - "Galaxy merger"

The Cosmic Evolution of Galaxy Structure and Morphology at 0.5 < z < 8 by Ferreira, Leonardo

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Prospects for gravitational-wave detection and supermassive black hole astrophysics with pulsar timing arrays by Ravi, V., Wyithe, J., Shannon, Ryan, Hobbs, G.

“…Uncertainties in the galaxy merger time-scale and the SMBH mass–galaxy bulge mass relation dominate the uncertainty in our predictions.…”
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Evidence for dynamically driven formation of the GW170817 neutron star binary in NGC 4993 by Palmese, A., Hartley, W., Tarsitano, F., Conselice, Christopher J., Lahav, O., Allam, S., Annis, J., Lin, H., Soares-Santos, M., Tucker, D., Brout, D., Banerji, M., Bechtol, K., Diehl, H.T., Fruchter, A., García-Bellido, J., Herner, K., Levan, A.J., Li, T.S., Lidman, C., Misra, K., Sako, M., Scolnic, D., Smith, M., Abbott, T.M.C., Abdalla, F.B., Benoit-Lévy, A., Bertin, E., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F.J., Cunha, C.E., D’Andrea, C.B., da Costa, L.N., Davis, C., DePoy, D.L., Desai, S., Dietrich, J.P., Doel, P., Drlica-Wagner, A., Eifler, T.F., Evrard, A.E., Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gerdes, D.W., Giannantonio, T., Gruen, D., Gruendl, R.A., Gschwend, J., Gutierrez, G., Honscheid, K., Jain, B., James, D.J., Jeltema, T., Johnson, M.W.G., Johnson, M.D., Krause, E., Kron, R., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Lima, M., Maia, M.A.G., March, M., Marshall, J.L., McMahon, R.G., Menanteau, F., Miller, C.J., Miquel, R., Neilsen, E., Ogando, R.L.C., Plazas, A.A., Reil, K., Romer, A.K., Sanchez, E., Schindler, R., Smith, R.C., Sobreira, F., Suchyta, E., Swanson, M.E.C., Tarle, G., Thomas, D., Thomas, R.C., Walker, A.R., Weller, J., Zhang, Y., Zuntz, J.

“…However, NGC 4993 presents shell-like structures and dust lanes indicative of a recent galaxy merger, with the optical transient located close to a shell. …”
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Follow Up of GW170817 and Its Electromagnetic Counterpart by Australian-Led Observing Programmes by Anderson, Gemma, Bland, Philip, Booler, Tom, Crosse, Brian, Cupák, Martin, de Gois, J.S., Devillepoix, Hadrien, Emrich, David, Franzen, Thomas, Hancock, Paul, Hartig, Ben, Horsley, L., Howie, Robert, Kenney, David, Paxman, Jonathan, Sansom, Eleanor, Shannon, Ryan, Sokolowski, Marcin, Steele, K., Tingay, Steven, Towner, Martin, Trott, Cathryn, Walker, Mia, Wayth, Randall, Williams, Andrew

“…Star formation in the host galaxy probably ceased at least a Gyr ago, although there is evidence for a galaxy merger. Binary pulsars with short (100 Myr) decay times are therefore unlikely progenitors, but pulsars like PSR B1534+12 with its 2.7 Gyr coalescence time could produce such a merger. …”
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Follow up of GW170817 and its electromagnetic counterpart by Australian-led observing programmes by Andreoni, I., Ackley, K., Cooke, J., Acharyya, A., Allison, J.R., Anderson, G.E., Ashley, M.C.B., Baade, D., Bailes, M., Bannister, K., Beardsley, A., Bessell, M.S., Bian, F., Bland, P.A., Boer, M., Booler, T., Brandeker, A., Brown, I.S., Buckley, D.A.H., Chang, S.-W., Coward, D.M., Crawford, S., Crisp, H., Crosse, B., Cucchiara, A., Cupák, M., de Gois, J.S., Deller, A., Devillepoix, H.A.R., Dobie, D., Elmer, E., Emrich, D., Farah, W., Farrell, T.J., Franzen, T., Gaensler, B.M., Galloway, D.K., Gendre, B., Giblin, T., Goobar, A., Green, J., Hancock, P.J., Hartig, B.A.D., Howell, E.J., Horsley, L., Hotan, A., Howie, R.M., Hu, L., Hu, Y., James, C.W., Johnston, S., Johnston-Hollitt, M., Kaplan, D.L., Kasliwal, M., Keane, E.F., Kenney, D., Klotz, A., Lau, R., Laugier, R., Lenc, E., Li, X., Liang, E., Lidman, C., Luvaul, L.C., Lynch, C., Ma, B., Macpherson, D., Mao, J., McClelland, D.E., McCully, C., Möller, A., Morales, M.F., Morris, D., Murphy, T., Noysena, K., Onken, C.A., Orange, N.B., Osłowski, S., Pallot, D., Paxman, J., Potter, S.B., Pritchard, T., Raja, W., Ridden-Harper, R., Romero-Colmenero, E., Sadler, E.M., Sansom, E.K., Scalzo, R.A., Schmidt, B.P., Scott, S.M., Seghouani, N., Shang, Z., Shannon, R.M., Shao, L., Shara, M.M., Sharp, R., Sokolowski, M., Sollerman, J., Staff, J., Steele, K., Sun, T., Suntzeff, N.B., Tao, C., Tingay, S., Towner, M.C., Thierry, P., Trott, C., Tucker, B.E., Väisänen, P., Krishnan, V. Venkatraman, Walker, M., Wang, L., Wang, X., Wayth, R., Whiting, M., Williams, A., Williams, T., Wolf, C., Wu, C., Wu, X., Yang, J., Yuan, X., Zhang, H., Zhou, J., Zovaro, H.

“…Star formation in the host galaxy probably ceased at least a Gyr ago, although there is evidence for a galaxy merger. Binary pulsars with short (100 Myr) decay times are therefore unlikely progenitors, but pulsars like PSR B1534+12 with its 2.7 Gyr coalescence time could produce such a merger. …”
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Limits on first structure formation from pulsar timing by Shannon, Ryan

“…As these binaries are the direct product of of galaxy mergers and the properties of the SMBHs correlated strongly with their host galaxies, the gravitational wave emission of the binaries can be used to study how galaxies evolve. …”
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Gravitational waves from binary supermassive black holes missing in pulsar observations by Shannon, Ryan, Ravi, V., Lentati, L., Lasky, P., Hobbs, G., Kerr, M., Manchester, R., Coles, W., Levin, Y., Bailes, M., Bhat, N., Burke-Spolaor, S., Dai, S., Keith, M., Oslowski, S., Reardon, D., Van Strateni, W., Toomey, L., Wang, J., Wen, L., Wyithe, J., Zhu, X.

“…Gravitational waves are expected to be radiated by supermassive black hole binaries formed during galaxy mergers. A stochastic superposition of gravitational waves from all such binary systems would modulate the arrival times of pulses from radio pulsars. …”
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A study of high-redshift AGN feedback in SZ cluster samples by Bîrzan, L., Rafferty, D., Brüggen, M., Intema, Hubertus

“…This lack may be due to the increased incidence of galaxy-galaxy mergers at higher redshift that triggers AGN activity. …”
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The history of stellar mass in the most massive galaxies at z < 3.5 by Mundy, Carl J.

“…This Thesis presents an investigation into two mechanisms - star-formation and galaxy mergers - which may be responsible for these observed changes. …”
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Looking at the Distant Universe with the MeerKAT Array: Discovery of a Luminous OH Megamaser at z > 0.5 by Glowacki, Marcin, Collier, J.D., Kazemi-Moridani, A., Frank, B., Roberts, H., Darling, J., Klöckner, H.R., Adams, N., Baker, A.J., Bershady, M., Blecher, T., Blyth, S.L., Bowler, R., Catinella, B., Chemin, L., Crawford, S.M., Cress, C., Davé, R., Deane, R., De Blok, E., Delhaize, J., Duncan, K., Elson, E., February, S., Gawiser, E., Hatfield, P., Healy, J., Henning, P., Hess, K.M., Heywood, I., Holwerda, B.W., Hoosain, M., Hughes, J.P., Hutchens, Z.L., Jarvis, M., Kannappan, S., Katz, N., Kereš, D., Korsaga, M., Kraan-Korteweg, R.C., Lah, P., Lochner, M., Maddox, N., Makhathini, S., Meurer, G.R., Meyer, M., Obreschkow, D., Oh, S.H., Oosterloo, T., Oppor, J., Pan, H., Pisano, D.J., Randriamiarinarivo, N., Ravindranath, S., Schröder, A.C., Skelton, R., Smirnov, O., Smith, M., Somerville, R.S., Srianand, R., Staveley-Smith, L., Tanaka, M., Vaccari, M., Van Driel, W., Verheijen, M., Walter, F., Wu, J.F., Zwaan, M.A.

“…In the local universe, OH megamasers (OHMs) are detected almost exclusively in infrared-luminous galaxies, with a prevalence that increases with IR luminosity, suggesting that they trace gas-rich galaxy mergers. Given the proximity of the rest frequencies of OH and the hyperfine transition of neutral atomic hydrogen (H i), radio surveys to probe the cosmic evolution of H i in galaxies also offer exciting prospects for exploiting OHMs to probe the cosmic history of gas-rich mergers. …”
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CO(1-0) survey of high-z radio galaxies: Alignment of molecular halo gas with distant radio sources by Emonts, B., Norris, R., Feain, I., Mao, M., Ekers, R., Miley, G., Seymour, Nick, Röttgering, H., Villar-Martín, M., Sadler, E., Carilli, C., Mahony, E., de Breuck, C., Stroe, A., Pentericci, L., van Moorsel, G., Drouart, G., Ivison, R., Greve, T., Humphrey, A., Wylezalek, D., Tadhunter, C.

“…For MRC 0152-209 and MRC 1138-262, part of the CO(1–0) emission coincides with the radio galaxy, while part is spread on scales of tens of kpc and likely associated with galaxy mergers. The molecular gas mass derived for these two systems is MH2 ~ 6 × 1010 M☉ (MH2/L′CO = 0.8). …”
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A CO-rich merger shaping a powerful and hyperluminous infrared radio galaxy at z = 2: The Dragonfly Galaxy by Emonts, B., Mao, M., Stroe, A., Pentericci, L., Villar-Martín, M., Norris, R., Miley, G., De Breuck, C., Van Moorsel, G., Lehnert, M., Carilli, C., Röttgering, H., Seymour, Nick, Sadler, E., Ekers, R., Drouart, G., Feain, I., Colina, L., Stevens, J., Holt, J.

“…In the low-redshift Universe, the most powerful radio sources are often associated with gas-rich galaxy mergers or interactions. We here present evidence for an advanced, gas-rich (‘wet’) merger associated with a powerful radio galaxy at a redshift of z ~ 2. …”
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Tracking the activity of supermassive black holes and the habitats of their hosts by Krishnan, Charutha

“…In conclusion of the work presented in this thesis, the majority of AGN (hosted by normal, star-forming galaxies) are likely triggered by the stochastic accretion of cold gas, without a dominant influence from the environment. It appears that galaxy mergers and interactions can play a role in triggering AGN, especially in passive host galaxies, but that they are not a crucial parameter for the vast majority of the AGN population.…”
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